The Bonhams Scientific Instruments department holds dedicated auctions in London twice a year in, as well as offering property within the Gentleman's Library sale, and one a year in New York in the History of Science & Technology sale. We offer instruments and apparatus from the earliest known historical artifacts to items from the late 19th and early 20th centuries. Our sales contain microscopes, telescopes, surveying and navigational instruments, globes, sundials, astrolabes, calculators, drawing instruments, barometers and barographs, medical and dental instruments.